Combustion-promoting device for stoves



unirsi) ,sTA'i'giasY POHATION OE MASSACHUSETTS.

PATENT- OFFICE.

NAPOLEON H.v EEBLAND, OE NOEWooIp, MASSACHUSETTS, ASSIGNOB. To THE AMENI- oAN NOVELTY COMPANY, INoonroEATED, OE NO EWOOD, MASSACHUSETTS, A COR- COMBUSTION-PROMOTING DEVICE FOR STOVES.

To all whom t may concern .1'

Be it known that I, NAPOLEON H. FER- LAND, a citizen of the United States, residing .at Norwood, in the county of Norfolk vand State of Massachusetts, have invented an Improvement in Combustion-Promoting Devices for Stoves, of which the following description, in connection with the accompanying drawings, is a specication, like characters on the drawings representing like parts.

The invention to vbe hereinafter described relates to stoves and other heaters, and more particularly to devices for promoting the lcombustion of the unconsumed products of combustion in the course of their transit from theV fire -boX to the chimney of the stove. Heretofore, devices have been employed for this purpose, but they have been of a bulky, complicated nature, and of special construction which prevents the same to be readilyadapted to standard Stoves without material alteration in the construe# tion of the latter. One of the purposes Vof the present invention, therefore, is to provide a simple, cheap and efficient device for promoting the combustion, which may be readily placed in operative position in theV flue or combustion chamber leading from the fire boX tothe chimney of the stove, without interference from the internal construction of the sto-ve. v

Another object of theinvention is to provide a combustion promoting device which may have a length sufficient to supply air and promote combustion of the entirewidth ofthe stream `of the gases Yof combustion in their transit from.the fire box to the chimney. A

Another purpose provide a combustion promoting devicehaving a row or series of air outlet ports for delivering wthe air to the gases of combustion, and to provide adjusting means foi' varying the effective openings of saidports properly toconform to the draft conditions yof the stove to whichthe device is applied.

Another Vpurpose of the invention is to provide a combustion promoting device in the form of an elongated box having a bottom adapted to rest directly on the floor of the flue or chamber :between the fire box and the chimney, and to;V provide .the series of air ports on thetop ofthe elongated box,

of the invention is to Specification of Letters Patent. Patented llay 3, l192.1. Application led September 119, 1919. Serial No. 324,824. v i

the construction being such' that the' gases Yof combustion must flow in a stream-over Vof shown in the accompanying drawing,

wherein :e

Figure 1 is a perspective viewv of 'a portion of an ordinary cooking sto-ve withfa portion of the top of the stove broken away to disclose the location of a. combustion tov promoting ldevice embodyingthe invention;

F ig,` 2 on an enlarged scale isa perspective rview of the combustion promoting device, certain parts thereof beingV shown in section; j Y

Fig. 3 is a sectional 3 3 of Fig. 2; and

Fig. 4 is a plan of a stovey lid appropriate for'use with the attachment.

Referring to the drawing, in Fig. 1 is shown lan ordinaryV or Standard form Vof stove-1 having the usual irefboX beneath the front lids 3, and a flue-or chamber '5 above the Oven for conducting the gases of combustion from The combustionV promoting device shown .herein as one good form of the invention, V comprises an elongated box 9 (Fig. 2) which may conveniently be in the form of a casting having a bottom .11,vsides 13 and ends V15 preferably all closed throughout. i Rising from the top 17 of the box preferably vadjacent one end thereof is an air inlet neck 19. Cooperating with this neck is a Y collar 21 depending from a lid section 23, .said collar being disposed eccentrically with respect to the lid section for a purpose hereinafter described. The section 23 may con- Stitute the inner section of a lid having an outer-ring section 25 (Fig. 1) and an intermediate ringV section 27. (Fig. 4), itbeing.

customary to employ `such sectional zlids vto accommodate cooking kutensils of` different sizes. Thecentral section 23 vmay have nubs or rounded. buttons .29 risingV therefrom to prevent a utensil from settingso:closely on detail taken on line l the fire box toV the chim- Y vney 7.- Y

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said section as to cover the opening in the Y collar and prevent entrance of air therein. Preferably the collar 21 should be substan-v tially larger than the neck 19 so as to leave an air space 31 through which the air may enter and tend to prevent overheating of the parts.

The outside air may enter the elongated box through the lcollar and neck described. To distribute this air to the stream of gases of combustion passing from the iire Vbox to the chimney, the top 17 of the' box may be provided with a row or seriesl of ports 33 at intervals in the length of the top of the. box between the neck 19 and the opposite end of the box. y

Standard stoves vary with respect to the draft effect thereof, and in some instances it may be desirable to supply a greater amount of air to the gases Vof combustion than in other instances. Accordingly, the

Aports 3 3 may be suiiiciently large to supply7 the maximum amount of air required, and meansmay be providedl for varying the effective openings of these ports. This means, in the present instance of the 4invention, comprises' a slide plate 35 superposed on the top'of the box and guided by longitudinal flanges v37 rising from the sides 9 of the box and conveniently formed integral therewith. This slide plate is provided with a row or series of ports 39 corresponding to Vthe ports 33 in the top plate of the ocx.

When it'is desired to supply the maximum amount of air through the ports 83, the slide plate is adjusted longitudinally to bring 'its Vports in registration with KVthe top plate ports,

but if it is desired to reduce the amount -of air supplied, the ports 33 may be throttled Somewhat by adjustment of the slide plate longitudinally thereof to a position, for example, such as shownin'Fig. 3. I j

In use, the elongated box may be placed in the flue or chamber 5 so as to extend in ar general front to rear direction, and occupy `the position transverse to the path'of the gases ofv combustion in their transit'from the fire box to the chimney. In order'that the device may have most efficient effect, it

is desirable that it should have a .length at least eal to the width of the stream of gases. he device is placed with its bottom resting directly on the `floor ofthe chamber 5, and no devices are required to attachtlie box to the floor ofsaid chamber, but on the contrary, it remains in position merely by resting on the Hoor of said chamber. c

The elongated box should be placed in la position such 4that the neck`19 thereof will be beneath the central section of the stove lid.V The neck should project up into or tele scope with the collar 21 of the central section 23 which may be substituted, for the usual central section whichy is in' the form of a plain disk, l

It may be desirable longitudinally to adjust the box somewhat in order that it may properly conform to the path of the gases of combustion, or to avoid interference with 'thewalls or other parts of the internal construction of the. stove. This may be readily accomplished by rotative adjustment of the section 23.

Since the collar 21 is eccentric with respect .to this section, the box will be longitudinally adjusted by the rotative adjustment of said section. Also, it may be desirable angularly to adjust the box, in order desirably to position the same or avoid interference withfwalls or other parts of the iuternal construction of the stove. To accomplish this, the box may be swung about the axis of the collar 21 to different positions of adjustment as desired. i

After the combustion promoting device hasbeen positioned as required, the gases of combustion from the fire box will flow over be desirably distributed and meet the stream' of gases as they flow over the top of the device. YThe air thus supplied to the gases will promote the combustion thereof', produce flames at the ports, and materially inj 'crease the heating effectv of the products of combustion. Thus, products are utilized for heating effect which otherwisewould escape unconsumed up through thechimney, and an important economy in fuel is obtained. The construction and location of the combustion promoting device is such that the additional combustion takes place between the top of the oven and the rear lids of the stove, with the result that the tem erature of the stove adjacent the' rear ids will be materially increased, as will also the temperature of the yoven.

and strong in construction and cheap to manufacture. It may be quickly and readily introducedv into its proper position in the stove by the user thereof without requiring the services of aV stovek expert.

If, after prolonged Vuse of the device, vmatters from the products of combustion should enter the elongated box, the latter may be readily freed therefrom by simply removing the box from lthe stove, tippingr `1 10 The device described` is extremely simple i The bottom of the box may always rest on the floor of the chamber and the neck of the box will assume a higher or lower position with respect to the collar according to the depth of the chamber. The overlap of the collar and neck is sufficient to allow for the variations indepth of the chamber above the oven in different standard stoves.

It will be understood that the invention is not limited to the specific embodiment shown, and that various deviations may be made therefrom without departing from the spirit and scope of the appended claims.

What is claimed is l. A combustion promoting device for stoves, comprising an elongated box provided with closed sides and ends and having a4`- row of outlet ports in its upper face, said box constructed to be positioned within a stove and be supported on the top of.

the oven, and arranged to extend across the path of travel of the gases passing from the fire-box to the chimney, an inlet neck rising from the top of the box and communieating with the interior of the box, and a stove top section having a :collar depending therefrom for admitting air into said inlet neck and telescopically adjusted on the neck so that the box may be positioned in chambers of diiferent depths between the oven and thetop of the stove. Y

2. A combustion promoting device for stoves, comprising an elongated box provided with closed sides and ends and having a row of outlet ports in its upper face, said box constructed to be positioned within a stove with its lower face in direct engageaxially therebetween, and an adjustable damper on the top of the box for regulating the flow of air through said box.

' 3. In combination'with a cook-stove having lid receiving openings inthe top. thereof, and a composite lid for one of said openings consisting of an outer ring section having smaller removable sections therein; a. combustion promoting device comprising an elongated box provided with sides and ends and having a row of outlet ports in its upper face, said box constructed to be positioned within the stove'with its lower face in direct engagement with the top of the oven and arranged to extend across the path of travel of the gases passing from the fire-box to the chimney, an inlet neck rising from the box and communicating with the interior of the box, and a lid section having a collar depending therefrom for admitting air into said inlet neck, said lid section constructed to replace the in*4 nermost section of said composite lid.

In testimony whereof I have signed my v name to this specification.

NAPOLEON H. FERLAND. 

